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Abstract
Based on theoretical prediction of the molecular polarity, water-soluble sodium HB-14-carboxylate (SCHB) was prepared and its photosensitization activity was evaluated. SCHB shows not only very good amphiphilicity but also much stronger absorption at 620 nm than its parents. In DMSO–PBS (3:1 by volume) solution (pH 7.4) of SCHB, the photosensitization generated the semiquinone anion radicals (SCHB − ) under anaerobic condition or superoxide anion radicals (O 2 − ) in the presence of oxygen. In the oxygenated PBS solution of SCHB, hydroxyl radicals ( OH) were photogenerated. In addition, SCHB could also be photosensitized to generate singlet oxygen ( 1O 2) with a quantum yield about 0.26. These findings suggest that SCHB can exert photodynamic action via photosensitization.
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